{
  "manageEntity": {
    "action": "Save",
    "entityId": "1107249",
    "entityType": "Track",
    "nonce": "1786022541717923655",
    "signature": "0xdfae3c9b55e385c331d5c8646c74a24ff3debf8d054042edaaf9359ad4d51edc6eb44e3345e598b2904c007ece01d644eb7c6e094b8139300046b58991dfa0631b",
    "signer": "0x6620103988B969bE5810F1B5530c1A44Fe6048A1",
    "userId": "568518925"
  }
}