{
  "manageEntity": {
    "action": "Save",
    "entityId": "1119492121",
    "entityType": "Track",
    "nonce": "0x9f3a485368a967c293aae2cf456c3ee799a32c063cd5e49db0d782bf4b863b2b",
    "signature": "0x66fe292646e9fb315c7f216873a38f999399258ef32d936a77590d89ff1f75847d4416cd4788916f1f6a37c8127a62ad89f53dd73b9b49da2cc4d15c56981e2d1c",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}