{
  "manageEntity": {
    "action": "Save",
    "entityId": "219981726",
    "entityType": "Track",
    "nonce": "0x097eac7e1152aa9ce6b7536747b1cca85a0e80e7b8afd8d615646ec107252ba3",
    "signature": "0x04c061e017a91d0248081489a264d216e74671caadaff3a2ac750920b56062fc5daa996c035b50628e4049ce9ecd0c2d7d9a874271af89cac0d764e03315f4dd1b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}