{
  "manageEntity": {
    "action": "Save",
    "entityId": "2045802591",
    "entityType": "Track",
    "nonce": "0xcc2f4a1a7ef722e01fa5587208464d2d86b43bfdbc3157225aa02c8f3dbcbcef",
    "signature": "0x7cacac55d000e01678707195f4a11fa4a325c7d73ca34c0486ea3b79ea65459a75cd8e60c98148d054bec183bed9039dbd4978c58ed31dd5da34e7dee888041d1c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}