{
  "manageEntity": {
    "action": "Save",
    "entityId": "1165647932",
    "entityType": "Track",
    "nonce": "0x447a970b1641b3fa0cc416d5c8e2a99fef06303bd5224a29a3a4ec66e68d6cd3",
    "signature": "0xf2508793ae65bf08c11a9c859d19071b416a18d645f25f6525d705e99eafe724357f5f7b89abdcb3f521098b5e17b508ee2fbd0868ff60a4e4c7f170a08098c31b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}