{
  "manageEntity": {
    "action": "Save",
    "entityId": "202354",
    "entityType": "Track",
    "nonce": "0x6b096e9040c8cd0c0cf6810d51e6243718a11e21cef604581c959db7c3a3b401",
    "signature": "0x2c8c7245f5b139556eac343d1489020f169b83a741ec914e4942bd6ac0c9a0961ddffddf0003d9acd87a6628917d5ac7a4e60868804714eb88caf23ed611a1651b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}