{
  "manageEntity": {
    "action": "Save",
    "entityId": "1277807652",
    "entityType": "Track",
    "nonce": "0xcf532c6a8617fb41b7c75e8d3a701867da5e0c022a11ee28ad8f334338787cd7",
    "signature": "0x43b24a593a1b791c13bc06e8704cf085cf1139439f177bf99fb59681e4c07a0c0013b4c6cf549d283ffbbe30d719d7f0e160d13ca88f853e3de7ae46ff94773d1c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}