{
  "manageEntity": {
    "action": "Save",
    "entityId": "1854710276",
    "entityType": "Track",
    "nonce": "0x2106c60c270ef06e6cab997047e6912a412e2ed969828237bf00fbe8f1c68d6c",
    "signature": "0x2a2e8266788d3431da15c3a3907111ba46a381e79738afddc6b2ce4311e6dda6103450a3488861bf1a1ac17335fd94352771ea839d1267e7ddbfbde0808fc4701b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}