{
  "manageEntity": {
    "action": "Save",
    "entityId": "1506636540",
    "entityType": "Track",
    "nonce": "0xe1a5e423e2cf70c69f129039258ef30be3988ec934d3945519af922a5f85cdbd",
    "signature": "0xd8e79249efd096b04ea0a149d607775b9f8e53e0f41532ce8c06b7605d20c2423d78980fce9b012550c91b0dd16bfedb78dbd3358ee10dd86e0a6b50b352b25c1c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}