{
  "manageEntity": {
    "action": "Save",
    "entityId": "1830744649",
    "entityType": "Track",
    "nonce": "0x1035afbc5f1fcdd00da142a64a1a753eba2d629d5f5104aa57ab31b24e4753a3",
    "signature": "0xe7b0ced443009a88087b2a4dee3cc70689c312163c58be8564ad110fad21125622d3251fd74843fff5c686a159d16b34dde806aea7dd089ccab6352b612379db1b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}