{
  "manageEntity": {
    "action": "Save",
    "entityId": "171002586",
    "entityType": "Track",
    "nonce": "0x16538e846b0ab54efb08739c507fba5aefe87777adcd1b018be63e0960f2dfdf",
    "signature": "0x949e89c8c39293724227c14bd6176513490e6f3a1d9b378aba6460eaed9d0a7b7b921926e7f4a1171453a3f09d9235bb1dde9b4350ab91862f80cdb9724326091b",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}