{
  "manageEntity": {
    "action": "Save",
    "entityId": "702162539",
    "entityType": "Track",
    "nonce": "0x82d12b3cbc36ee314f0ec3e752457c5ac458da579680a3ac93b10011e72b4625",
    "signature": "0xa686a34c1f0cb6dca2cc6b75750ba4a029c59f597ba5d44db8cc6d042133f91f1c77e4807618b3ad8026a942b53bd9bae021cc75d147672d9c596758681bf63b1b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}