{
  "manageEntity": {
    "action": "Save",
    "entityId": "526043935",
    "entityType": "Track",
    "nonce": "0xec0085db0bb876231565edc04ff411b7f4f91090b64d2af59769b1eed3366747",
    "signature": "0x73f04d5df00cf7a8d101a750fe2a7859af9ca2b0831c95a1de2ec429b90d1bd92ed28b90dd313b873c270582ce06d3844292bd6d5abab71025c27738c25dd0aa1c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}