{
  "manageEntity": {
    "action": "Save",
    "entityId": "2044585632",
    "entityType": "Track",
    "nonce": "0x806734da6983f6a2a76ce2edfb1c209c527b19a9261e201ffc16bcc5dddabaa9",
    "signature": "0xd2214d9dd020412f38e3441f6ef827656e2d8dcf6dd99893b23689d1693dacd311d44977d4b428b4cd268819a8302d528404608dd87547f3a56af5bd4a86f1021b",
    "signer": "0xc97A6025Ad8c7Ba1a35Ef7E3A3b88ABc8b2013BF",
    "userId": "666092734"
  }
}