{
  "manageEntity": {
    "action": "Save",
    "entityId": "1756636262",
    "entityType": "Track",
    "nonce": "0xf37ca88f9307ce888ce9526f4442c3b2b8c8462c8c789914edb1542485765c12",
    "signature": "0xb7a10c41af97ec8081eedbe9a9ac281fad935844204c531eb56722b60bb810c371cdc7f06566b80835ac53ecee3bc9e160163ff96e508279bd78a11931a9d2a31b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}