{
  "manageEntity": {
    "action": "Save",
    "entityId": "1142975902",
    "entityType": "Track",
    "nonce": "0xf7e325608b5ac963120b84416ed90d34422b9f17175d74a07585f2960127ed44",
    "signature": "0x58b18a2536a023c66ada111b80098eda351e410d5656ae6ea80f4fe88ba057800125869d9bb46fddea81ea41919cbda94d7e7be2d74dcaa7f4e67c1071af64721c",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}