{
  "manageEntity": {
    "action": "Save",
    "entityId": "1999492152",
    "entityType": "Track",
    "nonce": "0xad41b5095aa70ecf326b484b8a07277e2d87d79e0e50763e19b6ee5247298829",
    "signature": "0xe18a1a25bc313cbed12d3ef521cd6343688bf7fa7a70df48c984cd81703c1a2902ebe78a1ae85ffda0ff8897d52d93e3ac2de020132e89b360b8d1ddc27e43571c",
    "signer": "0x036B1ee0d2003ae5B5E252d58647d13f0e588EEB",
    "userId": "161353174"
  }
}