{
  "manageEntity": {
    "action": "Save",
    "entityId": "1913667456",
    "entityType": "Track",
    "nonce": "0xc57995259bcca33aae9321d4a20c0035abb9ee69e523234bcf481b35e052e31b",
    "signature": "0x145a4a738d61b4b90cccc58a0109dcbb5262b47fba50c10b0f52ca5aa734b1b549bce47707a2b5e2c721fb291e71f28129b0af11983654e7795decff0aaf40911b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}