{
  "manageEntity": {
    "action": "Save",
    "entityId": "1896577952",
    "entityType": "Track",
    "nonce": "0xb4e5bea5cb5f64dd6d4db24f4c0f4b22843053176d431fcf0e688b10959e0132",
    "signature": "0x9337f6b2b1f7de2d622484124d41f101e70d11af8e60afffa7ea23fc9b4af81137d102bf4b6f9cc0cd7042b5a230b0565fca2891b892e575a1c11b70adeab6931b",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}