{
  "manageEntity": {
    "action": "Save",
    "entityId": "977160769",
    "entityType": "Track",
    "nonce": "0xae922010ee5bdc71e084f6a474d675442ae975da48aaf7634a12a849f0d889ba",
    "signature": "0xb007638bde9938d76876d6c8f2fdefbd606ce7981ef3c462562b7c902b53c4bc36a3072c5c5f6d58880a70d7ba126a971b39510d215975f793225c701b9ebcc51c",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}