{
  "manageEntity": {
    "action": "Save",
    "entityId": "1706261774",
    "entityType": "Track",
    "nonce": "0x0c2d038bd52a7b834a5c84f0db350ed20a3ca25a9b7915dd3d56d939cb5d5303",
    "signature": "0x9d6b21bfded59b255c8ec90b092c158430241d90c985311e9b403823b2ba74ad5623ef067f3b1748202a11c8a0cf1992a459fc63cfbed87b2a05c80e01a273761b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}