{
  "manageEntity": {
    "action": "Save",
    "entityId": "1740339868",
    "entityType": "Track",
    "nonce": "0x4116be1ff10fcef7cd41c6b85f545f79fc5074319116a0c14126f31597a417db",
    "signature": "0xae0d45c42f65501dc677f0bfadf944183bea9dc1d599495a718d1fb13689682e720810c7f025a6491699d3f4f794d34d31ffa604e0fadd444e84401d1e8555051b",
    "signer": "0xfa1f98f0530E55C2BEFA45f0F1B3A699b4559136",
    "userId": "149566028"
  }
}