{
  "manageEntity": {
    "action": "Save",
    "entityId": "631430536",
    "entityType": "Track",
    "nonce": "0x7ac3b869c77558a933de7b7816268d10fd665367937ff557c1d06bead3520869",
    "signature": "0xde7c9412c655ab063b1c0cdc277f05c19ecb9d142a5adf2a7529e9e2a7ce254677a9e3cdb79efee0ce0820d05a73da76b7f83c5a34ffb7d52eb384129c6134631b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}