{
  "manageEntity": {
    "action": "Save",
    "entityId": "1609113543",
    "entityType": "Track",
    "nonce": "0x4242d58ea4b2fb6077bbbc4aaa2f0b123e7e4cf264ffe0bbc97cfcd238c4bbcc",
    "signature": "0x776129ae7cf7622266f06f266fd827c1f57f3880a1887f6d678d3d8fc32f37170cae55284c19f419c73a83257a743692aa6ec3321f131258fcf4b1123eb899201b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}