{
  "manageEntity": {
    "action": "Save",
    "entityId": "1437923772",
    "entityType": "Track",
    "nonce": "0xfad43fdd1b0ec113b65f5da4d4b1c5ffc1378ec2a9b091d370d6ec4a2ad25958",
    "signature": "0xabe6032952830dcaf6e70d86ee91c1d0f85827639d49deb60bddd84d6a2a450b21e1fb735da2009f881716a112f20c963d9f80ab35451f2a6090a01a20c96b571c",
    "signer": "0x34Cea527C1dc0575a5B686515aad0Bf8F3b5f97E",
    "userId": "13589021"
  }
}