{
  "manageEntity": {
    "action": "Save",
    "entityId": "854344690",
    "entityType": "Track",
    "nonce": "0xc5ec856696e86b4b836c74b80135ae5b1abaf663235c53fa4dfa65835217f8ed",
    "signature": "0x7cd03a5c27e411a36d6aca81e4a834e0ddb0b104a70f86c5d3bf1660d426295616aa0f402463ccd667f92067ea52380cf61d2795f73387c4f111594d1aedb1a81b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}