{
  "manageEntity": {
    "action": "Save",
    "entityId": "1176778988",
    "entityType": "Track",
    "nonce": "0xc3748eb1997a1bdd31c9e4e767178ec07026a7ae21d8ef66f0a3075473bed112",
    "signature": "0x924237e1580eba7c5aab19534f2d8058dfa2b794124c1ea71eb0fd0d3ce84378543d0f9888c72e14ec7264c4888f085924cb1fc61cde788b0cc04f5a946a6fb81c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}