{
  "manageEntity": {
    "action": "Save",
    "entityId": "1324592449",
    "entityType": "Track",
    "nonce": "0x3a37de81120894fac690634768d9897b7930b122c97f60c93916e6633028d9fb",
    "signature": "0xc5b8c4a433656923148cadd1c4c822dfebdd1860c5becb3aa77ec616a18252bd4e69678c468465ad489852e904345b5ff0e3dfe01b4813b5c508dd48eb4162811c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}