{
  "manageEntity": {
    "action": "Save",
    "entityId": "649492763",
    "entityType": "Track",
    "nonce": "0x9e32c8fe5dc76972242a0d04346aaf285e708a079cfecd34e17b2822137be716",
    "signature": "0xf3eb7f4ebab5b6a52fbfef8deb3588a913314c6a12f6e42a0d34f032627a96d919ca39c63d690962af6e50cd803131ab08dafdee3e3b15e400c6d29f0b9f83511c",
    "signer": "0x88ad765B72fb060B3adbae1FA44A6C64722E1781",
    "userId": "236177"
  }
}