{
  "manageEntity": {
    "action": "Save",
    "entityId": "148009165",
    "entityType": "Track",
    "nonce": "0x08ec5c6ebf4ed48c5f79254a61702b78bdb532db463a893a5ea965f568809441",
    "signature": "0x163f1d90ae619285a9487ddd8191878703206115a94b2845ad0af0fd03f20b987fa76124e258f27d83be9161ba41a1562ff2af64a657fe4ee343aaf6f42f41b41b",
    "signer": "0x2545D0068Da223e3E1D0F418A602D5b99F460d5C",
    "userId": "626189233"
  }
}