{
  "manageEntity": {
    "action": "Save",
    "entityId": "1144668152",
    "entityType": "Track",
    "nonce": "0xc486db1675fed5c0daff1a38ac75119b85b5a42d348b9d9d64c9d1f7540defd1",
    "signature": "0x021d2683de44eccc448ccd4cda50bc49c1afa3e125c651039b7414db99e5cdf73f25eaffb19a43c27b65207d98573341c279719247ab39482070c080ea42d6a01b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}