{
  "manageEntity": {
    "action": "Save",
    "entityId": "1928434324",
    "entityType": "Track",
    "nonce": "0xe35fa17f70890920aa7088d6a84c5b7ff602833fa19233e88ad93fde45a6d2d5",
    "signature": "0x622050d22ddd0c1a6eb650cfb49878f3b9852b1860fe4d4329ecf14b8ebb985936200a67abcbaac33a60ecfa8689ac0282fc9cc365484d55909b3d56b8b9b1d91b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}