{
  "manageEntity": {
    "action": "Save",
    "entityId": "1530611837",
    "entityType": "Track",
    "nonce": "0xdd9b08233aa06c8e8e8a16dfdff1689c8a2e0c1094c4c10c135345347831efbd",
    "signature": "0x1b193ec59317ade33e408c690de85d62f8bc6bbc6106d7d6cddc3e1d6100a5cd4d1646266d28fe21a3a1452d5d14c6f1938a0cc839f1fdb271b80e7f69c9886b1b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}