{
  "manageEntity": {
    "action": "Save",
    "entityId": "1618363343",
    "entityType": "Track",
    "nonce": "0xed51d150d67b895fd123723b083cf428a26198d17f6165ad32131904d3bd4f3c",
    "signature": "0xfb84b97e0a29d57c1ad569754e0c269eda2abce033fc552c07e66de2017d549b03dd61a430d2d47c01b7ac0f91e0a0e1a94e07457e72c8fca0904c0250d515151b",
    "signer": "0xbeFE463FeBb0e7d3fF9B4e01FD1585a288b55934",
    "userId": "307344"
  }
}