{
  "manageEntity": {
    "action": "Save",
    "entityId": "410894147",
    "entityType": "Track",
    "nonce": "0xa7aca9a216c879c225585f8d1bbb8ee4ad7fbe47517e6e7db21a0fddd29673b6",
    "signature": "0x05680e3f722ce5812a747b762befb3454c67ed394bf1d389a2e5c4efe04e9cc2501eec524ff8e40e7484218542631799b531355aeb313c6baab9919751617c911c",
    "signer": "0x484d8957F3f2AAC8A75b6c9769692fB7Bf806850",
    "userId": "413536646"
  }
}