{
  "manageEntity": {
    "action": "Save",
    "entityId": "1885219685",
    "entityType": "Track",
    "nonce": "0x964f67c2f4cf5f73c4248c0c52d62b6ba576492e8d73107eb129d6d096167116",
    "signature": "0xe5e780a2d5b84e56359ce8c0e54f7dcebb69f83458caa426c841582936fbca3520c1290bb0491a17d38f001cd6256fd48ac2b04f56d2e45ae637bcf649c48df91b",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}