{
  "manageEntity": {
    "action": "Save",
    "entityId": "1722228863",
    "entityType": "Track",
    "nonce": "0xe513ea1f8da86b5073a6adba31c1f64ebe790b31479c762825c04a01691ea2a6",
    "signature": "0x341171b7fd3972180b7381b030f608ee4fdfec3f198855d2fc02515d8c0508b8112d24fae6dab6b8fe30fe3d6b0c5be16c525ac4e77e19b74eb31a0d246ed13a1b",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}