{
  "manageEntity": {
    "action": "Save",
    "entityId": "169961220",
    "entityType": "Track",
    "nonce": "0xab71e7068c0451a15d94d078080fa83e1a81e8cfae0cc645f09740f20c39db0e",
    "signature": "0x18fdc162d20d158404cc2b09695cd53afd43d537e75f7635196e3eab739ae3fe15026e567cea54bbdaab6eab412d9a8b5c4ddbac37d9274a264723b176b0bb611c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}