{
  "manageEntity": {
    "action": "Save",
    "entityId": "534500750",
    "entityType": "Track",
    "nonce": "0x410098bb04e96cf22bbb473669d54ada319924e2b1d3ee5355dabe52de87fac2",
    "signature": "0x627e6a300b8d6e594f5d79a38f30297787c70e62f051079679eca099f2de35693bfd1933e85299333b2619596c9533c0a1580c6a1f67c692eae5980fb05b0c761c",
    "signer": "0x204E506f1D5498d2CABD41d2fc7a3078d5792835",
    "userId": "768479471"
  }
}