{
  "manageEntity": {
    "action": "Save",
    "entityId": "208565234",
    "entityType": "Track",
    "nonce": "0x99d4c8c4ed6cd14827eafd9af93506fe4cee74da2ca081aa282272a9b25e6efa",
    "signature": "0x856bb60f4e74bfa3cc8216ce870b4aa7742f557b697c6c86f6f53217439269447bfa5882fe2db011d67e56e2dd1081c746d4446617b25ad6c1c5d49aa3adf4661b",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}