{
  "manageEntity": {
    "action": "Save",
    "entityId": "526472887",
    "entityType": "Track",
    "nonce": "1786712404675506783",
    "signature": "0x94fc2903cace8d47b3bd0e128fe49ab6edfd303fb4c67af50ca924762e87871c5a1987be451f42e2bc50d8e789070fd415d221580d64ca2f0b8b78be07fae0171b",
    "signer": "0xd30fAF377491796757Ef4C1B0ccA8a407920e663",
    "userId": "451691735"
  }
}