{
  "manageEntity": {
    "action": "Save",
    "entityId": "730950770",
    "entityType": "Track",
    "nonce": "0x5ab88464f7ff204b02b3f955e39836ed1db6805c0de2aaa1e90bf5bca58ac6fd",
    "signature": "0x8201bafa5d9e5863a47bb8aebef1cc63f12392252ca7fadf6f571c9498a33ab34332ae49736c0915ededd757b867c4707f2bafc9a9d692abd912f342b35f69e31b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}