{
  "manageEntity": {
    "action": "Save",
    "entityId": "1303714382",
    "entityType": "Track",
    "nonce": "0x89189599d744953037cb0d0aa735edc917bbca4ecb7773de2a08fcbff5bb6760",
    "signature": "0x0d9917aee2ba06bfbb79d0cbc3c532c3be53caca3a6fbb2dfa31e363b7ceb80b3cae2a35b789569865ed0d005996e401cf638d0c786ec471a2b99d789a15d6f81c",
    "signer": "0x569a23a5D506E4404139fB7510738Ee5b80F5624",
    "userId": "280440301"
  }
}