{
  "manageEntity": {
    "action": "Save",
    "entityId": "1037739",
    "entityType": "Track",
    "nonce": "0x80f0633c3eccd0ca945aa2485619d2a277603f9af366b6aa437b4de865ac5046",
    "signature": "0xc6a77c5ed505033914e45c65e13cb23a7443211049061de5cedfabdb2e09670376e09f838ddedeec2eb898a3418c1770a9bf6c80148a71159f5fd3b753b82eb71b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}